Terex TL120 Operating Instructions Manual page 98

8 Trouble-Shooting
Possible cause
Hydraulic oil exceeds max. admissible temperature
Thermo switch damaged
Oil level too low
Oil cooler dirty or damaged
Suction filter clogged
High-pressure valves do not respond all the time or
too early
Flushing circulation not functioning
Travel pump or travel motor damaged (wear)
Loader pump worn
Main pressure relief valve damaged
Sluggish acceleration and deceleration, too little propulsive power
Insufficient engine power
Brake has got stuck
No tank pressurization
Suction filter clogged
FAST-SLOW-gear not functioning due to electric or
mechanical fault
Fault in brake-inching device
Charge pump sucking up air
Travel pump incorrectly adjusted
Insufficient charge or supply pressure
Pressure relief valve of charge circuit dirty or
damaged
Insufficient high-pressure
Travel pump does not open fully, pilot pressure too
low
Internal damage to travel pump or travel motor
Travel motor mis-adjusted
Table 31 Table of faults
98
Remedy
Replace
Top up oil to mark on dipstick
Clean, check and replace if required
Replace
Check high-pressure valves, re-adjust or replace if necessary
Check pressure of flushing and charge pump, possible back pressure
in cooling circuit, check housing pressure
Replace
Replace
Replace
Check diesel engine
Check, remedy damage
Check ventilation filters and breathers, replace
Replace filter
Check power supply and solenoid valve, repair and replace if
necessary
Check travel motor
Check, adjust, replace
Check, eliminate leaks
Re-adjust travel pump
Check pressure, adjust
Check, re-adjust or replace
Check high-pressure; re-adjust or replace pressure cut-off and high-
pressure valves if required.
Nozzles clogged, check, repair
Replace units
Re-adjust travel motor
Operating Instructions Wheel Loader TL120